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GB/T 41248-2022: Measuring systems for gaseous fuel
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Measuring systems for gaseous fuel
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GB/T 41248-2022
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Basic data | Standard ID | GB/T 41248-2022 (GB/T41248-2022) | | Description (Translated English) | Measuring systems for gaseous fuel | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N12 | | Word Count Estimation | 94,986 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 41248-2022: Measuring systems for gaseous fuel---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Measuring systems for gaseous fuel
ICS 17.120.10;91.140.40
CCSN12
National Standards of People's Republic of China
Gas metering system
(OIMLR140.2007,MOD)
Published on 2022-03-09
2022-10-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Foreword V
1 Scope 1
2 Normative references 1
3 Terms and Definitions 3
3.1 Metering system and components 3
3.2 Metrology characteristics 6
3.3 Tests and test conditions 8
3.4 Related Electronic Devices 9
4 Units of measurement and abbreviations9
4.1 Units of measurement9
4.2 Symbols and Abbreviations 10
5 Metering system 10
5.1 Overview 10
5.2 Composition of the metering system 10
5.3 Flow measurement 12
6 Metrology Requirements 12
6.1 Accuracy classes of metering systems 12
6.2 Maximum allowable error of the metering system 12
6.3 Maximum permissible error of the measuring module 12
6.4 Other metrological properties of calorific value measuring devices 15
6.5 Maximum allowable error of totalizer 17
6.6 Measuring Module Repeatability 17
6.7 Durability of measurement modules 17
6.8 Maximum allowable error for subsequent verification and inspection in use 17
7 Technical requirements of metering system 17
7.1 General 17
7.2 Measurement module 19
7.3 Conversion to volume or mass at standard conditions 20
7.4 Energy Measurement 23
7.5 Marking 25
7.6 Seal 26
8 Technical requirements for flow meters, measurement modules and auxiliary equipment 26
8.1 Flow meters and measurement modules 26
8.2 Indicating devices 27
8.3 Printing equipment 28
8.4 Memory 28
8.5 Matching measuring instruments 29
8.6 Volume conversion device 29
8.7 Totalizer 29
8.8 Calorific value measuring device 29
8.9 Energy conversion device 30
9 Technical requirements for electronic equipment 31
9.1 General requirements 31
9.2 Power Supply 31
9.3 Checker 32
10 Metrology Management 34
10.1 General 34
10.2 Type approval 35
10.3 The first check 42
10.4 Subsequent checks 43
10.5 System Documentation, Quality Management System and Routine Inspection 43
Appendix A (Informative) This document and OIMLR140.2007 chapter numbering list 44
Appendix B (informative) General rules for gas metering systems 45
B.1 Composition of energy metering system 45
B.2 Flow Measurement Technology 47
B.3 Design of the metering system 48
B.4 Provisions on flow distribution of access ports 49
Appendix C (normative) Modular approach and error calculation method 52
C.1 Principle 52
C.2 Example of maximum allowable error calculation [Class A (Class) measurement system] 52
C.3 Error calculation example 53
C.4 Other calorific value and energy management examples 57
Appendix D (normative) Influencing factor test for type evaluation of measurement modules 60
D.1 Overview 60
D.2 General Provisions 60
D.3 Influence of piping installation 60
D.4 Influence of gas pressure 61
D.5 Influence of gas temperature 61
D.6 Overall impact (quantity of system impact) 62
D.7 The maximum allowable error of the first verification 62
D.8 Specific cases 62
Appendix E (normative) Performance Environmental Impact Test of Electronic Metering System or Equipment 64
E.1 Overview 64
E.2 Harsh Level 64
E.3 Reference conditions 64
E.4 Performance test 64
Appendix F (normative) Calibration gases for calorific value measuring instruments 75
F.1 General 75
F.2 Calibration gas requirements 75
F.3 Specific requirements for calibration gas for gas calorific value measuring instruments 76
F.4 Composition and physical properties 77
Appendix G (Informative) Conversion of Gas Mass to Volume at Standard Conditions 80
G.1 Calculation of conversion from mass to volume under standard conditions 80
G.2 Calculation of Gas Density at Standard Conditions Using the Nonideal Gas Law 80
G.3 Calculated variables (ρb) for standard density measurements 81
Appendix H (Informative) Examples of Minimum Test Quantities for Metrology Systems and Devices 83
Reference 85
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document uses the redrafted law to modify and adopt OIMLR140.2007 "Gas Metering System".
This document has been structurally adjusted compared to OIMLR 140.2007.Appendix A lists the differences between this document and OIMLR 140.2007.
Chapter number comparison list.
The technical differences between this document and OIMLR140.2007 and the reasons are as follows.
--- Regarding normative reference documents, this document has made adjustments with technical differences to adapt to the technical conditions of our country.
as follows.
● Replaced IEC 60068-2-1 with GB/T 2423.1 equivalent to adopting international standards (see Table E.3);
● Replaced IEC 60068-2-2 (see Table E.2) with GB/T 2423.2 equivalent to international standards;
● Replaced IEC 60068-2-78 (see Table E.4) with GB/T 2423.3 equivalent to international standards;
● Replaced IEC 60068-2-30 with GB/T 2423.4 equivalent to the international standard (see Table E.5);
● Replaced IEC 60068-2-47 with GB/T 2423.43 which is equivalent to adopting international standards (see Table E.6);
● Replaced IEC 60068-2-64 with GB/T 2423.56 which is equivalent to adopting international standards (see Table E.6);
● Replaced IEC 60068-3-1 with GB/T 2424.1 equivalent to the international standard (see Table E.2 and Table E.3);
● Replaced IEC 60068-3-4 with GB/T 2424.2 equivalent to international standards (see Table E.4 and Table E.5);
● Replace ISO 6976 with GB/T 11062-2020 which is equivalent to adopting international standards (see 7.3.2 and G.3.3);
● Replaced ISO 10715 with GB/T 13609-2017 modified to adopt international standards (see 8.1.1);
● Replace IEC 60654-2 with GB/T 17214.2-2005 which is equivalent to adopting international standards (see Table E.13);
● Replaced IEC 61000-4-1 with GB/T 17626.1 which is equivalent to the international standard (see Table E.14 and Table E.16);
● Replaced IEC 61000-4-2 with GB/T 17626.2 which is equivalent to adopting international standards (see Table E.11);
● Replaced IEC 61000-4-3 (see Table E.7) with GB/T 17626.3 equivalent to international standards;
● Replaced IEC 61000-4-4 with GB/T 17626.4 which is equivalent to the international standard (see Table E.16);
● Replaced IEC 61000-4-5 with GB/T 17626.5 which is equivalent to the international standard (see Table E.12 and Table E.17);
● Replaced IEC 61000-4-6 (see Table E.10) with GB/T 17626.6 which is equivalent to the international standard;
● Replaced IEC 61000-4-11 with GB/T 17626.11 which is equivalent to adopting international standards (see Table E.15);
● Replaced IOS6551 with GB/T 17746-1999 which is equivalent to adopting international standards (see 9.3.2);
● Replaced ISO 12213-1 with GB/T 17747.1-2011 which was modified to adopt international standard (see F.2.3);
● ISO 12213-2 (see 6.3.3.1 and F.2.3) is replaced by GB/T 17747.2-2011 which is modified to adopt international standards;
● Replaced ISO 12213-3 with GB/T 17747.3-2011 which was modified to adopt international standard (see F.2.3);
● Replacing IEC 61000-6-1 with GB/T 17799.1-2017 modified to adopt international standards (see Table E.15);
● Replace IEC 61000-6-2 with GB/T 17799.2-2003 which is equivalent to adopting international standards (see Table E.15);
● Replaced IEC 61000-2-2 with GB/T 18039.3-2017 which is equivalent to adopting international standards (see Table E.14);
● Replace IEC 61000-2-1 with GB /Z 18039.5-2003 which is equivalent to adopting international standards (see Table E.14);
● Replaced IEC 60751 (see 10.2.1) with GB/T 30121-2013 equivalent to international standards;
● Replaced OIMLR137-1 with GB/T 32201-2015 modified to adopt international standards
● Replace ISO 6141 with GB/T 35860-2018 which is equivalent to adopting international standards (see F.2.7);
--- Change the content of Note 2 in 7.1.4 to the text content;
--- Change the note in Table E.11 to a footnote.
The following editorial changes have been made to this document.
--- Merge Chapters 1 and 2 of R140.2007 into Chapter 1; modify the scope according to the requirements of GB/T 1.1;
--- Deleted the note in 6.8;
--- The suspension section in R140.2007 has been numbered and titled, and the number that does not meet the requirements has been revised.
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Industrial Process Measurement Control and Automation (SAC/TC124).
This document is drafted by. Beijing Institute of Metrology and Testing, Shanghai Industrial Automation Instrumentation Research Institute Co., Ltd., China Metrology Division
Institute of Metrology, Chongqing Institute of Metrology and Quality Inspection, Henan Institute of Metrology, Gold Card Intelligent Group Co., Ltd., Chongqing Qianwei
Watch Industry Co., Ltd., Tianxin Instrument Group Co., Ltd., Zhejiang Cangnan Instrument Group Co., Ltd., Shandong Starte Measurement and Control Equipment Co., Ltd.
Company, Xintian Technology Co., Ltd., Chengdu Qinchuan Internet of Things Technology Co., Ltd., Liaoning Sky Technology Co., Ltd., Rongcheng Yu
Xiang Industrial Co., Ltd., China Petroleum & Chemical Corporation Natural Gas Branch, National Petroleum and Natural Gas Mass Flow Metering Station Nanjing Branch,
Sinopec Qingdao LNG Co., Ltd.
The main drafters of this document. Yang Youtao, Guo Aihua, Li Chunhui, Liao Xin, Cui Yaohua, Ding Yuanming, Qiu Wanbiao, Tao Chaojian, Zhang Shengyi,
Yin Yuguo, Fei Zhanbo, Quan Yaqiang, Shi Jianjun, Zou Ziming, Yan Wencan, Guo Mingchang, Wang Xiaoshang.
Gas metering system
1 Scope
This document specifies the terms and definitions of gas metering systems, measurement units and abbreviations, measurement requirements, measurement system technical requirements, flow rate
Technical requirements for meters, measurement modules and auxiliary equipment, technical requirements for electronic equipment and measurement management requirements.
This document is applicable to the design under standard conditions, the maximum flow rate is greater than or equal to 100m3/h, and the absolute working pressure is greater than or equal to
200kPa gas metering system.
This document does not apply to compressed natural gas (CNG) metering systems for vehicles.
This document does not provide any requirements applicable to flow meters.
This document does not apply to membrane gas meters.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 2423.1 Environmental Testing of Electrical and Electronic Products Part 2.Test Methods Test A. Low Temperature (GB/T 2423.1-
2008, IEC 60068-2-1.2007, IDT)
GB/T 2423.2 Environmental Testing of Electrical and Electronic Products Part 2.Test Methods Test B. High Temperature (GB/T 2423.2-
2008, IEC 60068-2-2.2007, IDT)
GB/T 2423.3 Environmental Test Part 2.Test Method Test Cab. Constant Damp Heat Test (GB/T 2423.3-2016,
IEC 60068-2-78.2012, IDT)
GB/T 2423.4 Environmental testing of electrical and electronic products Part 2.Test method Test Db. Alternating damp heat (12h 12h cycle
Ring) (GB/T 2423.4-2008, IEC 60068-2-30.2005, IDT)
GB/T 2423.43 Environmental Testing of Electrical and Electronic Products Part 2.Test Methods Vibration, Shock and Similar Dynamic Test Specimens
Installation of products (GB/T 2423.43-2008, IEC 60068-2-47.2005, IDT)
GB/T 2423.56 Environmental Testing Part 2.Test Methods Test Fh. Broadband Random Vibration and Guidelines (GB/T 2423.56-
2018, IEC 60068-2-64.2008, IDT)
GB/T 2424.1 Environmental Testing Part 3.Supporting Documents and Guidelines Low Temperature and High Temperature Testing (GB/T 2424.1-2015,
IEC 60068-3-1.2011, IDT)
GB/T 2424.2 Electrical and Electronic Products Environmental Test Guide for Damp Heat Test (GB/T 2424.2-2005, IEC 60068-3-4.
2001, IDT)
GB/T 11062-2020 Calculation method of calorific value, density, relative density and Wobbe index of natural gas (ISO 6976.2016,
IDT)
GB/T 13609-2017 Guidelines for natural gas sampling (ISO 10715.1997, MOD)
GB/T 17214.2-2005 Working conditions of industrial process measurement and control devices - Part 2.Power (IEC 60654-2.
1979, IDT)
GB/T 17626.1 Electromagnetic Compatibility Test and Measurement Technology Immunity Test General (GB/T 17626.1-2006,
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